Channel access method for vehicle communication handover

Abstract

A first roadside equipment operates as a transmitting/receiving mode in a control channel interval of an Nth synchronization interval so as to support a handover. In this instance, a second roadside equipment neighboring to the first roadside equipment operates as a receiving mode in the control channel interval of the Nth synchronization interval. The first roadside equipment operates as the receiving mode in a control channel interval of an (N+1)th synchronization interval. In this instance, the second roadside equipment operates as the transmitting/receiving mode in the control channel interval of the (N+1)th synchronization interval.

What is claimed is: 
     
       1. A method for a plurality of roadside equipments to access a channel to support a vehicle communication handover, the method comprising:
 a first roadside equipment among the plurality of roadside equipments operating a transmitting/receiving mode in a control channel interval of an Nth synchronization interval; 
 a second roadside equipment neighboring to the first roadside equipment among the plurality of roadside equipments operating as a receiving mode in the control channel interval of the Nth synchronization interval; 
 the first roadside equipment operating as the receiving mode in a control channel interval of an (N+1)th synchronization interval; and 
 the second roadside equipment operating as the transmitting/receiving mode in the control channel interval of the (N+1)th synchronization interval. 
 
     
     
       2. The method of  claim 1 , wherein the Nth synchronization interval and the (N+1)th synchronization interval respectively further include a service channel interval. 
     
     
       3. The method of  claim 2 , wherein the plurality of roadside equipments operating as the transmitting/receiving mode in the service channel interval of the Nth synchronization interval and the (N+1)th synchronization interval. 
     
     
       4. The method of  claim 1 , wherein the first roadside equipment or the second roadside equipment transmits/receives a frame to/from a vehicle in the transmitting/receiving mode. 
     
     
       5. The method of  claim 1 , wherein the first roadside equipment or the second roadside equipment receives a frame from a vehicle in the receiving mode. 
     
     
       6. The method of  claim 1 , wherein the first roadside equipment and the second roadside equipment are disposed to form an interval in which a propagation range is overlapped. 
     
     
       7. The method of  claim 1 , wherein the control channel interval and the service channel interval are alternately set in the Nth synchronization interval and the (N+1)th synchronization interval. 
     
     
       8. A method for a plurality of roadside equipments to access a channel to support a vehicle communication handover, the method comprising:
 a first roadside equipment among the plurality of roadside equipments operating as a transmitting/receiving mode in a control channel interval of an Nth synchronization interval; 
 a second roadside equipment neighboring to the first roadside equipment among the plurality of roadside equipments operating as a receiving mode in the control channel interval of the Nth synchronization interval; 
 the first roadside equipment and the second roadside equipment operating as the transmitting/receiving mode in a service channel interval of the N-th synchronization interval; 
 the first roadside equipment operating as the receiving mode in a control channel interval of an (N+1)th synchronization interval; 
 the second roadside equipment operating as the transmitting/receiving mode in the control channel interval of the (N+1)th synchronization interval; and 
 the first roadside equipment and the second roadside equipment operating as the transmitting/receiving mode in a service channel interval of the (N+1)th synchronization interval. 
 
     
     
       9. The method of  claim 8 , wherein the first roadside equipment or the second roadside equipment transmits/receives a frame to/from a vehicle in the transmitting/receiving mode. 
     
     
       10. The method of  claim 8 , wherein the first roadside equipment or the second roadside equipment receives a frame from a vehicle in the receiving mode. 
     
     
       11. The method of  claim 8 , wherein the first roadside equipment and the second roadside equipment are disposed to form an interval in which a propagation range is overlapped. 
     
     
       12. The method of  claim 8 , wherein the control channel interval and the service channel interval are alternately set in the Nth synchronization interval and the (N+1)th synchronization interval.